Next-gen mocks and stubs for PHP 5.4

mocks.php

<?php

use FooBar\Test\Mock;

// In the sample below, $mock expects the method "sayHelloTo" to be called one time 
// with the parameter $name equals "Alexandre" and return "Hello Alexandre"

$mock = (new Mock('NamespaceVendor\\ClassName'))([
    'sayHelloTo' => function($name="Alexandre") {
        return "Hello Alexandre";
    },
    // Different expectations for the same method
    'sayHappy' => [
        function($animal='Panda') { return 'Happy Panda'; },
        function($animal='Bear') { return 'Happy Bear'; }
    ],
    // Matching number of calls on a given method
    '__toString' => array_fill(0, 10, function() { return 'Happy Panda'; })
]);

stubs.php

<?php

use FooBar\Test\Stub;

// In the sample below, $stub acts as a stub. Pretty much self-explained.

$stub = (new Stub('NamespaceVendor\\ClassName'))([
    'sayHelloTo' => function($name) {
        echo "Hello $name";
    }
]);

$stub->sayHelloTo("Alexandre"); //Hello Alexandre

This looks awesome.